Cheers. Sorry no pics yet, if I do it again I'll be sure to get one of how I did it.
Basically I just used something like a prepsol and wiped the bumper where I planned to stick it, I put tape on the screen of the phone (as this was against the paint and I didn't want them to rub) and then a piece of tape vertically over the phone to hold it in place. It seemed very secure and I wasn't worried about it falling off. I got pretty lucky with the position/angle just about perfect.